I have had this since 2013. So don't know if it will last yet but it has never needed sharpening.
It is a cross between a pen and pencil made of special alloy. It does eventually run out but takes so long that it shouldn't.
Problem is we get given so many free pens will we ever be able to put it to the test.
Absolutely wonderful to have a tool we use in our everyday lives that it not meant to wear out.